| 摘要 |
PROBLEM TO BE SOLVED: To provide an inexpensive configuration capable of operating the supply of washing liquid of a main body device from a grip of a spray gun by radio, providing stable performance, and facilitating maintenance and inspection when adopting the configuration in a system car washing machine comprising a plurality of terminals units and one main body device. SOLUTION: In this system car washing machine comprising a plurality of terminal units 8 to 10 in which respective spray guns 23 to 25 are provided with transmitters 32 to 34 and one main body device 1 for receiving data signals transmitted from the transmitters 8 to 10 by receivers 4 or 35 to 37 provided in the terminal units 8 to 10 or the main body device 1 to supply washing liquid into each terminal unit 8 to 10, the data signals to be transmitted include distinguishing signals for identifying the terminal units 8 to 10 and battery voltage signals of the transmitters 32 to 34 in addition to a command signal for commanding the supply of washing liquid. Furthermore, when transmitting the data signals, the same data signal is continuously transmitted several times per one transmission operation.
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